diff --git a/myhdl/intbv.py b/myhdl/intbv.py
index eb4a296f..014ba423 100644
--- a/myhdl/intbv.py
+++ b/myhdl/intbv.py
@@ -51,7 +51,6 @@ class intbv(object):
         else:
             raise TypeError("intbv constructor arg should be int or string")
         self._checkBounds()
-        
 
     def _checkBounds(self):
         if self._max is not None:
@@ -62,7 +61,6 @@ class intbv(object):
             if self._val < self._min:
                 raise ValueError("intbv value %s < minimum %s" %
                                  (self._val, self._min))
-        
 
     # concat method
     def concat(self, *args):
diff --git a/myhdl/test_intbvbounds.py b/myhdl/test_intbvbounds.py
index 66780f9f..56a08ac9 100644
--- a/myhdl/test_intbvbounds.py
+++ b/myhdl/test_intbvbounds.py
@@ -56,26 +56,26 @@ class TestIntbvBounds(TestCase):
     def testSliceAssign(self):
         a = intbv(min=-24, max=34)
         for i in (-24, -2, 13, 33):
-            a[:] = i
-            a[10:] = i
+            for k in (0, 9, 10):
+                a[k:] = i
         for i in (-25, -128, 34, 35, 229):
+            for k in (0, 9, 10):
+                try:
+                    a[k:] = i
+                except ValueError:
+                    pass
+                else:
+                    self.fail()
+        a = intbv(5)[8:]
+        for v in (0, 2**8-1, 100):
+            a[:] = v
+        for v in (-1, 2**8, -10, 1000):
             try:
-                a[:] = i
-                a[10:] = i
+                a[:] = v
             except ValueError:
                 pass
             else:
                 self.fail()
-        a = intbv(5)[8:]
-        a[:] = 0
-        a[:] = 2**8-1
-        try:
-            a[:] = -1
-            a[:] = 2**8
-        except ValueError:
-            pass
-        else:
-            self.fail()